40% Concentrate in Water, Yellow dyed, Industrial-Grade Inhibited Propylene Glycol (PG) Thermal Fluid for Heat Transfer Applications between -6°F and 325°F.
Product Overview

DOWFROST™ HD 40% inhibited propylene glycol (PG) is a prediluted, ready-to-use thermal fluid for easy fill & operation in a range of heat transfer equipment. DOWFROST™ HD 40% is comprised of <60% water, 37.0% to 43.0% propylene glycol, and <5% corrosion inhibitors & proprietary additives.

DOWFROST™ HD 40% is dyed fluorescent yellow for easy identification for industrial applications and is engineered to exhibit greater stability at higher temperatures than regular DOWFROST™. DOWFROST™ HD 40% is particularly well suited for applications exposed to temperatures between -6°F and 325°F (-21°C and 162°C).

Product Specifications
Color: Fluorescent Yellow Dyed
Specific Gravity at (60/60°F): 1.053-1.063
pH of Solution (50% glycol): 9.5 – 10.5
Reserve Alkalinity – 15.0 ml
Composition (% by weight)
Propylene Glycol – 37.0 – 43.0
Inhibitors & Additives – 5.0
Water – 60.0
Features & Benefits
Propylene glycol-based fluid (37-43%)
Fluorescent yellow
Excellent Corrosion Prevention & Protection
Not USDA/FDA approved
Enhanced Stability for Industrial Equipment
Thermal Operating Range (-6°F and 325°F)
Problems Solved
Shortened Thermal Fluid Life or Excessive Fluid Consumption
Required Frequent Maintenance Intervals
System Rust and Corrosion, Including Copper

DOWFROST™ HD 40% is an ideal thermal fluid for a broad variety of heat transfer applications across a range of industries and applications. Including, but not limited to:

Heating, Ventilation & Air Conditioning (HVAC)
Chill water & hydronic heating loops
Geothermal (ground source heat pumps)
Snow melt & Turf heating systems
Solar hot water heating
Fire water sprinkler systems
Ice skating rinks
Cold storage, refrigerated warehouses & supermarkets (secondary loop)
Thermal Energy Storage (TES)